function OpenCenter(url, name, height, width) {
	var str = "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,"
	str += "height=" + height + ",innerHeight=" + height;
	str += ",width=" + width + ",innerWidth=" + width;
	name = "_blank"
	if (window.screen) {
		var ah = screen.availHeight - 30;
		var aw = screen.availWidth - 10;

		var xc = (aw - width) / 2;
		var yc = (ah - height) / 2;

		str += ",left=" + xc + ",screenX=" + xc;
		str += ",top=" + yc + ",screenY=" + yc;
	}
	 return window.open(url, name, str);
}